本篇設計並且合成出六個新型有機染料SC1~6以10'H-spiro[fluorene-9,9'-phenanthren]-10'-one作為修飾受體，並應用於染料敏化太陽能電池。將螺旋結構加入染料可以防止分子與分子之間堆積，也可提高熱穩定性，10'H-spiro[fluorene-9,9'-phenanthren]-10'-one結構中具有拉電子基的羰基，可以幫助分子內的電荷轉移進而提高Jsc。並利用非平面結構且具有推電子性質的Triphenylamine以及Phenothiazine作為電子予體，為了增加給電子能力以及防止暗電流的產生，因此加入長鏈在染料分子內，並以Thiopheneyl與Phenyl延長共軛，增加吸光範圍。 在元件測試中證實SC系列因染料分子結構龐大所以無明顯堆疊。利用CF3與N719進行混摻，其效率有所提升，但仍然比CF3與N719低。在AM1.5照射下SC-3優越於其他SC系列染料，效率達4.77%，在室內光源CWF與TL84強度為2500 lux照射下，SC-3效率高達18.09%與15.05%。 Six novel organic dyes of SC1~6 which containing the 10'H-spiro[fluorene-9,9'-phenanthren]-10'-one moiety as auxiliary acceptor were synthesized and applied for dye-sensitized solar cells (DSSCs). The organic sensitizers with spiro-structure moiety not only can prevents intermolecular aggregation but also improves thermal stability. The 10'H-spiro[fluorene-9,9'-phenanthren]-10'-one possesses the electron-withdrawing property that can help charge transfer, expected to improve Voc. We use the concept that the non-planar, strong electron donating group triphenylamine and phenothiazine as donor and sensitizers with long alkoxy chains, attempt to increase molecule dipole and prevent dark current. Addition to that phenyl and thiophenyl have also been widely used as a π-linker for sensitizers which can extend the conjugation and and increase absorbance range. The SC-3 have best performance of 4.77% under one sun AM1.5. In the dopant-test, sole dye of CF3 and N719 showed the good result than dopant system, due to the bulky SC-sensitizers shared the loading amount in DSSCs devices. The further DSSCs device test under indoor light, the SC-3 exhibited the 18.09% and 15.05% under the indoor light source CWF and TL84 intensity with 2500 lux.
